The variation in splitting measurement results (φ_app and δt_app) with the BAZ by different methods for two-layer anisotropic models, with the occurrence of horizontal component misalignment (θ₀= 20°). Measurements by the traditional methods, SC–ST (diamonds), RC–ST (open circles) and EV–ST (crosses), deviate significantly from the values (black line) predicted by the models. The GM method results (closed circles) almost fit the values predicted by the models.